diff --git a/clickhouse_driver/columns/datecolumn.py b/clickhouse_driver/columns/datecolumn.py
index d704db3f..7eac9c12 100644
--- a/clickhouse_driver/columns/datecolumn.py
+++ b/clickhouse_driver/columns/datecolumn.py
@@ -34,7 +34,7 @@ def before_write_items(self, items, nulls_map=None):
                 items[i] = null_value
                 continue
 
-            if type(item) != date:
+            if item is not date:
                 item = date(item.year, item.month, item.day)
 
             if min_value <= item <= max_value: